tim x biet : x . (x 2)= 35
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.35 + x . 12 = 83..............................
=> 12x = 48............................................
=> x = 4...............................................
.35 + x . 12 = 83..............................
=> 12x = 48............................................
=> x = 4...............................................
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a. x -6 = 35 : 7 + 42 : 6
=> x - 6 = 5 + 7
=> x -6 = 12
=> x = 12 + 6
=> x = 18
Các câu sau tương tự, bạn học tốt nha! .-.
a)x-6=5+7
x-6=12
x=6.
b)x-2=42-13
x-2=29
x=29+2
x=31
c)(36+81):x=13
117:x=13
x=117:13
x=9.
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pt vô số nghiệm \(\left(x;y\right)=\left(x;\frac{3x-35}{5}\right)\)
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\(12.x-5^4\div5^2=35\)
\(12.x-5^2=35\)
\(12.x-25=35\)
\(12.x=60\)
\(x=60\div12\)
\(x=5\)
Ta có:
\(12\times x-5^4:5^2=35\)
\(\Leftrightarrow12\times x-5^{4-2}=35\)
\(\Leftrightarrow12\times x-5^2=35\)
\(\Leftrightarrow12\times x-25=35\)
\(\Leftrightarrow12\times x=35+25\)
\(\Leftrightarrow12\times x=60\)
\(\Leftrightarrow x=60\div12\)
\(\Leftrightarrow x=5\)
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2x2 = 35
x2 = 35/2
x = \(\sqrt{\frac{35}{2}}\)hoặc -\(\sqrt{\frac{35}{2}}\)
tìm x biết x . (x+2)= 35